Github user metatype commented on the issue:
https://github.com/apache/geode-examples/pull/4
Here's a possible unit test. It mocks the Geode API (lol), invokes the
Example, and checks `System.out` .
```java
package org.apache.geode.examples.replicated;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.powermock.api.mockito.PowerMockito.whenNew;
import java.util.Collections;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.client.ClientCache;
import org.apache.geode.cache.client.ClientCacheFactory;
import org.apache.geode.cache.client.ClientRegionFactory;
import org.apache.geode.cache.client.ClientRegionShortcut;
import org.junit.Rule;
import org.junit.Test;
import org.junit.contrib.java.lang.system.SystemOutRule;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Example.class })
public class ExampleTest {
@Rule
public SystemOutRule systemOutRule = new SystemOutRule().enableLog();
@Test
@SuppressWarnings("unchecked")
public void testExample() throws Exception {
ClientCacheFactory cacheFactory = mock(ClientCacheFactory.class);
whenNew(ClientCacheFactory.class).withNoArguments()
.thenReturn(cacheFactory);
when(cacheFactory.addPoolLocator(any(),
anyInt())).thenReturn(cacheFactory);
when(cacheFactory.set(any(), any())).thenReturn(cacheFactory);
ClientCache cache = mock(ClientCache.class);
when(cacheFactory.create()).thenReturn(cache);
ClientRegionFactory<Integer, String> regionFactory = mock(
ClientRegionFactory.class);
when(cache.<Integer, String> createClientRegionFactory(
isA(ClientRegionShortcut.class))).thenReturn(regionFactory);
Region<Integer, String> region = mock(Region.class);
when(regionFactory.create(any())).thenReturn(region);
when(region.getName()).thenReturn("example-region");
when(region.put(any(), any())).thenReturn(null);
when(region.get(any())).thenReturn("value");
when(region.keySetOnServer()).thenReturn(Collections.EMPTY_SET);
Example.main(null);
assertThat(systemOutRule.getLog())
.contains("Inserted 10 entries into region");
}
}
```
Thoughts?
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